html5-img
1 / 15

Staten Island Bluebelt

Staten Island Bluebelt. NYC Department of Environmental Protection July 2,2010. Staten Island Bluebelt. Staten Island Bluebelt Watersheds. 3. Project Background. South Richmond, Staten Island: Last large unsewered part of New York City. Last significant stand of wetlands.

berget
Télécharger la présentation

Staten Island Bluebelt

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Staten Island Bluebelt NYC Department of Environmental Protection July 2,2010

  2. Staten Island Bluebelt

  3. Staten Island Bluebelt Watersheds 3

  4. Project Background • South Richmond, Staten Island: • Last large unsewered part of New York City. • Last significant stand of wetlands. • Failing septic systems and street flooding. • Need for new drainage plans that: • Provide necessary infrastructure. • Preserve wetlands. 4

  5. Project Background • South Richmond, Staten Island: • Drainage plans dating from the 1960’s assumed full sewering eliminating all wetlands. • Public policies to protect wetlands: • NYSDEC freshwater and tidal wetland regulations. • SSRDD enacted Open Space Network. • City and state parks created. • How to preserve wetlands while providing drainage infrastructure? 5

  6. Staten Island Bluebelt Program: Overall Strategies • Develop storm water management system utilizing existing wetlands. • Collect street runoff in storm sewers; improve capacity of hydraulic structures. • At sewer-wetland interface, use BMP's to mitigate impacts of urban runoff and local flooding. • Build separate sanitary sewer system. 6

  7. Typical Schematic of Bluebelt Drainage Plan with BMP's Storm Sewers 5 Outlet Outlet Stilling Stilling Extended Extended Basin Basin Detention Detention Existing Pond Sand Filter Sand Filter 4 3 NYCDEP NYCDEP State State Bluebelt Bluebelt Wetland Wetland Boundary Boundary Boundary Boundary Micropool Micropool NYC Park Boundary NYC Park Boundary Forebay Forebay 6 Upper Pool Lower Pool 2 Micropool 1 Forebay Forebay 7 Constructed Constructed Micropool Wetland Micropool Wetland 8 • Extended Detention Basin • Pocket Wetland • Sand Filter • Retrofit of Existing Pond • Outlet Stilling Basin • Culvert Reconstruction • Meandering Stream • Stream Restoration 7

  8. Staten Island Bluebelt Program: Planning Process Evaluation of Alternatives Interagency Drainage Plan Coordination Public Presentations Impact Analysis Draft Environmental Impact Statement Regulatory Public Agency Review Review Final Environmental Impact Statement Final Designs Permitting Construction 8

  9. BMP RC-4: Construction Sequence Step 1: The site is cleared of debris and brush. Step 2: The land is excavated and graded to form the desired topography for the new wetlands. 9

  10. BMP RC-4: Construction Sequence Step 3: For subsurface preparation, a Claymax liner, subsoil and topsoil are overlaid. Step 4: Erosion control mat and wetland plantings are installed. 10

  11. BMP RC-4: Construction Sequence Step 5: Storm water is introduced into the constructed wetland. Functioning constructed wetland after one growing season. 11

  12. Bluebelt Field Management • Vactor Operations • Maintenance Accessways • Perimeter Treatments • Field Operations • Adopt-A-Bluebelt 12

  13. Vactor Operations 13

  14. Maintenance Accessways & Perimeter Treatments Maintenance Accessways Perimeter Treatments 14

  15. Adopt-A-Bluebelt Program 15

More Related